The Mansion (also called Turtle Mansion) is a major Safe Zone located on Floating Turtle in the Third Sea. It serves as one of the most important social and utility hubs in late-game progression, housing many key NPCs and frequently acting as a gathering point for players.

A large number of Third Sea players visit the Mansion to trade, access important NPCs, or simply socialize. It contains three trading tables, making it one of the main trading locations in the Third Sea.

Players can enter through the main entrance or by using the Portal from Castle on the Sea. The Mansion is located beside the Forest Pirates area, making it easy to reach while exploring Floating Turtle.

Visually, the Mansion features yellow plaster walls separated by white columns, along with a flat blue roof and multiple exterior windows. Inside, the walls are green with white and gold columns, centered around two massive pillars in the main hall. The interior also includes a white marble floor, a red carpet, several doors, and an upper mezzanine wrapping around the walls, giving the building a grand and luxurious appearance.